87780313138825 has 24 divisors (see below), whose sum is σ = 110384225957376. Its totient is φ = 69232935408000.

The previous prime is 87780313138807. The next prime is 87780313138841. The reversal of 87780313138825 is 52883131308778.

It is not a de Polignac number, because 87780313138825 - 2¹³ = 87780313130633 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55150920 + ... + 56720230.

It is an arithmetic number, because the mean of its divisors is an integer number (4599342748224).

Almost surely, 2^{87780313138825} is an apocalyptic number.

It is an amenable number.

87780313138825 is a deficient number, since it is larger than the sum of its proper divisors (22603912818551).

87780313138825 is a wasteful number, since it uses less digits than its factorization.

87780313138825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600905 (or 1600900 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 64.

The spelling of 87780313138825 in words is "eighty-seven trillion, seven hundred eighty billion, three hundred thirteen million, one hundred thirty-eight thousand, eight hundred twenty-five".